Medium-term outcomes of hybrid total hip arthroplasty in cats: Cemented femoral stem and cementless acetabular cup in 17 hips (2020-2023).

Abstract

Objective: To describe the surgical technique, complications and outcome of hybrid total hip replacement (THR) in cats using a BioMedtrix cemented femoral stem and cementless acetabular cup.

Study design: A retrospective case series.

Animals: Cats undergoing hybrid THR between 2020 and 2023.

Methods: The present study was a retrospective review of medical records. Postoperative radiographs were reviewed and implant positioning measured. Owner-reported follow-up was obtained via questionnaire utilizing the short-form feline musculoskeletal pain index (sf-FMPI).

Results: A total of 17 hybrid THRs were performed with two cats undergoing bilateral THR. A 12 mm BioMedtrix micro BFX acetabular cup was placed in all cats in combination with a CFX femoral stem. Follow up imaging demonstrated no change in implant position. No intra- or postoperative complications were reported. Hybrid THR was successfully performed in one case as a revision strategy for recurrent hip luxation following CFX THR. Owner-reported follow-up was obtained for 10 out of 15 cats (mean 438 days postoperatively; range, 185-1084 days). Overall satisfaction was excellent and the mean sf-FMPI score was 2/36.

Conclusion: This study demonstrates that hybrid THR using a micro BFX acetabular cup is feasible in cats with a good medium to long-term outcome. These results compare favorably to previous reports of feline THR.

Clinical significance: Hybrid THR in cats has a low complication rate and high owner satisfaction. This technique should be considered for the management of coxofemoral disease in cats and can be considered for CFX cup revision.